Search a number
-
+
440122981 is a prime number
BaseRepresentation
bin11010001110111…
…011111001100101
31010200011120020011
4122032323321211
51400132413411
6111401210221
713622661244
oct3216737145
91120146204
10440122981
1120648aa01
12103490971
137024c0cc
144264a95b
152898bc21
hex1a3bbe65

440122981 has 2 divisors, whose sum is σ = 440122982. Its totient is φ = 440122980.

The previous prime is 440122961. The next prime is 440122997. The reversal of 440122981 is 189221044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 438232356 + 1890625 = 20934^2 + 1375^2 .

It is a cyclic number.

It is not a de Polignac number, because 440122981 - 213 = 440114789 is a prime.

It is a super-2 number, since 2×4401229812 = 387416476808652722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440122961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220061490 + 220061491.

It is an arithmetic number, because the mean of its divisors is an integer number (220061491).

Almost surely, 2440122981 is an apocalyptic number.

It is an amenable number.

440122981 is a deficient number, since it is larger than the sum of its proper divisors (1).

440122981 is an equidigital number, since it uses as much as digits as its factorization.

440122981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 440122981 is about 20979.1082031625. The cubic root of 440122981 is about 760.6613478083.

The spelling of 440122981 in words is "four hundred forty million, one hundred twenty-two thousand, nine hundred eighty-one".